Drenching gun



March 26, 1935. D. R. BOWLING 1395,9711

DRENCHING GUN Filed OCC. 2, 1934 Patented Mar. Z6, 1935 1,995,957.11/ DRENCHING GUN4 Dudley Russell Dowling, Graceville, near Brisbane, Queensland, Australia Application October 2, 1934, Serial No.' 746,570

` `In Australia November 13, 1933 4 Claims.

This invention relates to an improved drenching gun, and has for its object the provision of a cheaply constructed, eiiicientand simply operated device for administering medicinal iiuids to animals, particularly sheep, for eradicating stomach worms and for treating other ailments.

The invention comprises a pair of telescoping tubes each closed at their outer end except for valved pipes, the pipe from the outer end of the larger tube leading to a containermounted upon the back of the operator, and the other pipe adapted for insertion in the animals mouth.

Each pipe is provided with anon-return valve and the telescoping tubes arefnormally held extended by a spiral spring which may be within them. Upon the larger tube a hand piece, and upon the smaller tube a trigger or lever are mounted s o `that normally when the two tubes are extended by the spring theyare apart a suitable distance.

Upon the top of the larger tube I provide a boss and upon the smaller tube a lug. A graduated gauge rod parallel Awith the telescoping tubes is secured in the said lug and moves freely in the said boss. ,The end of the gauge rod which passes through the boss is threaded and a nut is provided for adjusting the gauge rod relative to the boss. In addition I provide upon the hand piece an adjustable set lscrew and locking nut for limiting the travel of the' hand piece and:

trigger towards each other and thereby enabling zero to be accurately determined upon the gauge rod, and if necessary afcompensating compression yspring between the said hand piece and trigger. i

The inventionl will be described with reference to the accompanying 'drawing wherein Figure 1 is side elevation of theinvention, and

Figure 2 is a part sectionalr elevation of the same. y

A. is the outertube and B the inner tube, the latter being adapted'to snuglyft and move in the former. C is the spring shown within the inner tube B and outer tubeA normally holding them in'extended position as shown in the drawing. D is a hand piece upon the'outertube A, and E isl a trigger or lever upon the inner or smaller tube B. F is a shaped tube for insertion into the animals mouth, said tube F leading from the closed end of tube B. G is another tube which conveys the liquid from a container (not shown) to the outer tube A.v H is a knurled nut adapted to holdpacking and to screw over the inner end ofthe tube A. J is a grease cupY for lubrication of the sliding surfaces of the tubes. K is a bolt `for clampingthehand piece D to the tube A. L and M arespring controlled ball. valves respectively in the pipe linesF and G. N and O are a boss and lug respectively'upon tubes A and B andP isa graduated rodsecured' in the lug O andsliding in boss N. RodP is" threaded at its end which Apasses freely through boss N and is provided with nut and lock nut-Q ,Y f'

and Q. R is a set screw and S a spring.` n In use the container of medicinal fluid may be carried by the operator upon'his backnor be conveyed by any suitable means. lThe container" is connected by a pipe line G` with theA outer end of the larger tubeA of the gun. f. i The travel of the trigger E towards the hand piece D is limited by thev set screw R so that when the two tubes A and B are closed the mark zero on the gauge rod P is in correct position.. The gauge rod P which is graduated, is set-by the nut Q upon its screwed end to the desired position for an individual dose, which is to say, the

travel of the two telescoping tubes A and B away from each other is set at a maximum. Normally n the uid ows into the telescoping tubes A and B f `from the container via the non-return valve M,

piece D the springs C and S-force the two tubes A and B apart to the limit set by the'gauge,r rod P, the non-return valve Lin'the mouth piece F closes and that in the delivery pipe G opens enabling another charge to collect in the tubes VAj and B for `subsequent application` to another animal. i

It will be obvious that the invention isl adapted with slight modifications for use in injecting predetermined doses of serum and the like, and for douching purposes and thelike. I Y

Upon the release or. the hand pressure upon the trigger E and hand 1. An improved drenching gun consisting of a pair of telescoping tubes closed .at their outer ends and provided with inletand outlet pipes having non-return valves, a compression spring for .normally extending the tubes, a hand piece having non-return valvesga. compression spring 2. An improved drenching gun as" claimed in claim 1 in combination with a lug and a boss upon the telescopingv tubes, 1a. graduated rod heldin for normany extendingtne tubes a hand piece upon one tube, and e. trigger upon the :other,tube.

4'. An improved drenching, gun consisting of a pair` ofk telescoping tubes closed atkr their outer ends and providedjwithinlet and outlet pipes having non-return' valves, acompression springk for normally extendingy the tubes, a hand piece upon one tube ande. trigger upon the other tube, v and means forv adjustably limiting'lthevolume A comprised between said pair of telescoping tubes. 10

DUDLEY RUSSELL DOWLING. 

